Synagrops spinosus

FamilyScientific NameAuthorYearCommon Name
AcropomatidaeSynagrops spinosusSchultz1940Keelcheek Bass

Family Acropomatidae – Rear edge of opercle with 1 or 2 flat points or several sharp spines. Gill membranes separate, free from isthmus; branchiostegal rays 6 or 7; gill rakers well developed. Dorsal fin divided to the base before last spine or completely separated into spiny and soft-rayed fins; first part with 8 or 9 spines, second with 1 spine and 9 or 10 soft rays. Anal fin with 2 or 3 spines and 7-9 soft rays.

Synagrops spinosus

Unique Characters: First dorsal fin with 9 spines. Anal fin with 2 spines and 7 or 9 soft rays. Anterior edge of pelvic-fin spine and second spines of first dorsal and anal fins serrate. Lateral-line scales 29-35. Body depth 3.3-3.8 times in standard length. Total gill rakers 17-20.

Similar Species:

Threespine Bass
Synagrops trispinosus

Blackmouth Bass
Synagrops bellus

Synagrops bellus
Blackmouth Bass – Synagrops bellus

Threespine Bass Synagrops trispinosus. First dorsal fin with 8 spines. Anal fin with 3 spines and 8 or 9 soft rays. Pelvic-fin spine serrate, other fin spines smooth. Preopercle serrate, subopercle and interopercle smooth. Lateral-line scales 46-51. Body depth contained 3.7-4.8 times in standard length.

Blackmouth Bass Synagrops bellus. First dorsal fin with 9 spines. Anal fin with 2 spines and 7 or 9 soft rays. Pelvic-fin spine smooth. Lateral-line scales 29-35. Body depth 3.3-3.8 times in standard length. Total gill rakers 13-17.

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